20378870500 has 24 divisors (see below), whose sum is σ = 44507454264. Its totient is φ = 8151548000.

The previous prime is 20378870467. The next prime is 20378870509. The reversal of 20378870500 is 507887302.

It can be written as a sum of positive squares in 4 ways, for example, as 271063296 + 20107807204 = 16464^2 + 141802^2 .

It is not an unprimeable number, because it can be changed into a prime (20378870509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20378371 + ... + 20379370.

It is an arithmetic number, because the mean of its divisors is an integer number (1854477261).

Almost surely, 2^20378870500 is an apocalyptic number.

20378870500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20378870500 is an abundant number, since it is smaller than the sum of its proper divisors (24128583764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20378870500 is a wasteful number, since it uses less digits than its factorization.

20378870500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40757760 (or 40757748 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 20378870500 in words is "twenty billion, three hundred seventy-eight million, eight hundred seventy thousand, five hundred".